Miscellaneous: UI: HP bar not updating with charms?

[Tecmos Deception]

I've been charm soloing in a few dungeons (kerra isle, sola, najena) and have frequently been having an issue where the HP bar for an enemy and/or my pet gets stuck at a given % and won't update for an indefinite period of time. Sometimes it updates after I tab back and forth a few times, sometimes it starts updating on its own without any target changing, sometimes the mob stays stuck at 73% hp until it suddenly dies.

Is this a probable issue with my UI (using duxaui I think) or client files or something? Or an issue with charm?